Cobalt webmail smtp server

Cobalt Webmail is a popular open-source webmail solution that provides a robust and customizable email client. To set up an SMTP server for Cobalt Webmail, you'll need to configure the following:

  1. SMTP Server: Cobalt Webmail uses the Postfix SMTP server by default. You can install Postfix on your server or use an existing installation.
  2. SMTP Authentication: You'll need to configure authentication for your SMTP server. Cobalt Webmail supports various authentication methods, including:
    • PLAIN (username and password)
    • CRAM-MD5 (username and password with MD5 encryption)
    • DIGEST-MD5 (username and password with MD5 encryption)
  3. SMTP Relay: You'll need to configure the SMTP relay settings to specify the mail server that will handle outgoing emails. This can be the same server as the one running Cobalt Webmail or a separate mail server.
  4. DNS Settings: You'll need to configure your DNS settings to point to your SMTP server. This includes setting up MX records and SPF records.

Here's an example of how you can configure the SMTP server settings in Cobalt Webmail:

Step 1: Configure Postfix

Edit the Postfix configuration file (/etc/postfix/main.cf) and add the following lines:

mydestination = yourdomain.com
myhostname = yourdomain.com
myorigin = $myhostname
smtpd_recipient_restrictions = permit_mynetworks, reject_unauth_destination

Replace yourdomain.com with your actual domain name.

Step 2: Configure SMTP Authentication

Edit the Cobalt Webmail configuration file (/etc/cobalt/webmail.conf) and add the following lines:

'smtp_auth_type' => 'PLAIN',
'smtp_username' => 'your_username',
'smtp_password' => 'your_password',

Replace your_username and your_password with your actual username and password.

Step 3: Configure SMTP Relay

Edit the Cobalt Webmail configuration file (/etc/cobalt/webmail.conf) and add the following lines:

'smtp_relay_host' => 'your_smtp_relay_host',
'smtp_relay_port' => 25,

Replace your_smtp_relay_host with the hostname or IP address of your SMTP relay server.

Step 4: Configure DNS Settings

Create a new MX record for your domain, pointing to your SMTP server:

yourdomain.com. IN MX 10 your_smtp_server.yourdomain.com.

Create a new SPF record for your domain:

yourdomain.com. IN TXT "v=spf1 a mx ip4:your_smtp_server.yourdomain.com. -all"

Replace your_smtp_server.yourdomain.com with the hostname or IP address of your SMTP server.

After configuring these settings, restart the Postfix service and test your SMTP server by sending an email from Cobalt Webmail.